Size: Coarse thread, 3/8-16 size, 1.4cm (L) x 3.6cm (W) x 6cm (H). Look at the second image in the main image. Please do not purchase without determining the wire specifications. Note: The maximum load of this product is 598.7 kg, recommended for large or heavy furniture with a leg diameter of more than 3.8 cm, such as high tables, side tables, storage cabinets, dressers and so on. right now. If less than this size, there is a risk of cracks during installation. Installation: You need to drill a hole of 1.27 cm in diameter and a depth of more than 3.8 cm on the furniture leg with a drill electric, then insert the T-slot (tightened by a hammer) and screw in the leg levelers. If it is a metal leg, you need to weld a 3/8 inch threaded insert first, then install the leveling feet. Function: Avoid direct contact between furniture legs and the floor, protect the floor, tile or carpet from damage. The height of the four furniture legs can also be adjusted according to your needs, the adjustment range is between 2.5cm and 5.1cm. Contains 4 furniture sliders